KREG Bench clamp baseProduct information "KREG Bench Clamp Base" The Bench Clamp Base makes it possible to use the power and convenience of Kreg Bench Clamps on any work surface, so you can create a versatile clamping station almost anywhere. The Bench Clamp Base is a perfect companion to the Kreg Mobile Project Center, and it allows you to get more from any work surface thats equipped with 3 4" or 20mm bench dog holes. Or, you can simply drill a hole in any work surface,